Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa9f24d3c726a98…

MALICIOUS

PDF

78.3 KB Created: 2021-05-28 21:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f367f96055d68f67f0eb0b1c658791b2 SHA-1: 542208885577f863fdb8a297b458c74f012c604f SHA-256: baa9f24d3c726a98265ba34ad482f4b1384c1ebdcbb6acbde5643111b6d4a40e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/strik?utm_term=how+to+install+wifi+panorama+camera PDF link annotation
    • https://pojosividadom.weebly.com/uploads/1/3/4/5/134524524/juwaguk_jagesoxupa_kanuvimetokez_lodewegebatezu.pdfIn PDF document text
    • https://migusubab.weebly.com/uploads/1/3/4/8/134849844/482f50734cb28c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460228/normal_605fdb44e139d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_606a455e8c449.pdfIn PDF document text
    • https://wipevotabekux.weebly.com/uploads/1/3/1/6/131607119/6555244.pdfIn PDF document text
    • https://xirofagoxo.weebly.com/uploads/1/3/4/5/134576207/4494239.pdfIn PDF document text
    • https://bazuditok.weebly.com/uploads/1/3/4/5/134590154/d58965cc910e82.pdfIn PDF document text
    • https://wuvatefowid.weebly.com/uploads/1/3/4/4/134470889/jonumajopuvomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_604071b35f29f.pdfIn PDF document text
    • https://nipibodofabujid.weebly.com/uploads/1/3/4/2/134265940/lajebur-nexukozuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/955561fb-5ed0-4193-816a-add3eb296749/fudumirixizobeteg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2722bb5b-009f-4f3f-90df-047ce7fb7ff4/canon_palm_printer_p1-dh_v_ink_roller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f230554f-9f27-4ff7-9f5f-ffe4d7bfbcc0/evolve_fundamentals_of_nursing_test_bank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96a0e31-5e51-4b59-ae94-294b25776082/demian_book_genre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e366e3-5edb-4035-8982-54b069249407/domomofasegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0f1d830-0ebb-493f-87ec-83826d9be3e6/how_to_use_a_corona_pole_saw_with_rope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d85d3e6-f100-4bec-bace-24637d5273e0/how_to_use_commands_in_minecraft_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faaaa7bf-1a8c-4e0e-bded-a566f5d25bee/2006_chemistry_regents_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccdf4341-834f-4ff9-b2a1-a5e750c8cd58/nesosozikobapataboxov.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F8 5212 bytes
SHA-256: 04ebea7b79ce79e71891b8776f60299e0e5cd98af44f7a296c60db5fd55fd7d6
font_01_sfnt_off000107b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B2 10492 bytes
SHA-256: 671abc65faee95ebae571917d47fcb3f8ae53904f21960777160321f8c6e5b39

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